This module has two objectives.
The first of which is to review measures
of disease frequency, like incidents,
prevalence, and odds, as well as extending
the conversation about incidents
to things like survival analysis
or the time until a given event occurs.
This can get complex fast
and your book will go into several different
measures of incidents that we will also discuss together.
One thing that I find useful
to keep me oriented when talking about measures
of incidents is that the numerator
always stays the same across
all of the different measures.
We only change the denominator.
So the numerator will always be the number
of events of interest in whatever time period
we're looking at.
Changing the denominator, for example,
talking above an incidence rate
versus the number of persons at risk
is just talking about the incidents
in more and more accurate ways.
The second objective is to review statistical inference.
This isn't in your book chapter,
but it's important to review
before we move forward and begin talking
about measures of association in the next module.
We'll review statistical tests,
like t-tests, Chi-square, and ANOVA.
You'll see this in your lab
and in some of the other materials below.
Again, please reach out to me
or Isabelle with any questions.